Steel belt conveyors

For the freezing of food, stainless steel belt conveyors are used, which are cooled with a spray of cold brine. The design of such conveyors is somewhat difficult, since sealing of the moving belt between the brine and food can cause leaks and abrasion. 

Several plants employ cooled-belt flakers. These consist of flexible steel belts, ca 1-m wide and up to 50-m long, that have short mbber skirting at the edges. Molten pitch flows from a thermostatically controlled tank over a weir to give a flat thin sheet on the belt, which is cooled from below by water sprays. At the end of the belt, the solid pitch is broken up by rotating tines. The pitch flakes are drained and transported to a covered storage silo by belt conveyor, during which time the surface moisture evaporates. 

Comparative costs for conveyor systems can be based only on studies of specific problems. For example, belt-conveyor idlers are available in a range of quahties that may make the best unit cost three times as much as the cheapest. Bearing quahty, steel thickness, and diameter of rolls all affect cost, as does design for easy maintenance and repair. Therefore, it is necessary to make cost comparisons on the basis of a specific study for each conveyor application. 

Band-feder, /. flat spring, -fdrderer, m. belt conveyor, -kante, /. edge of a band, band head, -mass, n. tape measure, -stabl, m. band steel, strip steel, bandstreifig, a. banded, streaked, striped. Band-trockuer, m. belt drier, -wunn, m. tapeworm. 

Continuous vulcanisation of rubber based products such as thin conveyor belting, flooring and similar can be achieved using a large rotating heated drum. Pressure is exerted to the product by means of a continuous stainless steel belt which presses the sheet to the surface of the drum. The belt is also heated from its reverse side to give optimum heat transfer to the vulcanising rubber. 

A five-meter drop tower was used to drop the coal lumps on different impact surfaces shown in Fig. 1. The different impact surfaces are steel plate, conveyor belt and coal stockpile. The details development of the drop tower was... 

Samples of South Blackwater and Ensham coal of +16.0 mm size were collected separately, from the stockpiles of the Gladstone Port. Before testing, both types of coals were sieved to obtain a —76.2 + 50.8 mm sized samples for the drop tests. The sample was placed inside the released hopper, which was raised by overhead crane. A sample of 10 kg was dropped each time onto an enclosed horizontal steel plate, conveyor belt and coal stockpile. The dropped coal was sieved to remove the fines (-16.0 mm size). In this way the percentage of fines produced at each drop were determined. The calculation methodology for fines percentage was given in Sahoo et al. [2],... 

Steel plate -Conveyor belt -Coal piles... 

The degradation model of three samples (cushioned coal, initial 10% fines and initial 30% fines) of South Blackwater coal is determined on three impact surfaces (steel plate, conveyor belt and coal stockpile). Degradation model equation can be written as follows ... 

Related Calculations. This procedure is valid for conveyors using rubber belts reinforced with cotton duck, open-mesh fabric, cords, or steel wires. It is also valid for stitched-canvas belts, balata belts, and flat-steel belts. The required horsepower input includes any power absorbed by idler pulleys. 

Wood chips are reclaimed from the storage pile by chip dozers and deposited in reclaim hoppers adjacent to the wood pile. Steel grates above the hoppers prevent frozen chips or oversized objects from jamming conveyors or otherwise fouling handling equipment. Draft conveyors installed beneath the hoppers discharge chips to inclined belt conveyors which elevate the wood fuel to storage bunkers situated above the power plant boilers. Chips are continuously fed to the boiler feeders to provide adequate fuel supply. 

A slat conveyor consists of individual slats attached to a chain (or other driving mechanism) that runs underneath the conveyor. Often the slats are made of wood or steel. Slat conveyors, similar to belt conveyors, provide a smooth conveying surface to move heavy and/or irregularly shaped loads that may or may not be containerized. Most conveyors used in the baggage claim areas of airports... 

Belt conveyor (through-flow) 18 < S < 50 21 0.59 304-stainless steel Drive, fan, steam heater... 

Fig. 1.5. Continuous belt-conveyor type heat treat furnace (1800 F, 982 C maximum). Except for very short lengths with very lightweight loads, a belt needs underside supports that are nonabrasive and heat resistant—in this case, thirteen rows, five wide of vertical 4 in. (100 mm) Series 304 stainless-steel capped pipes, between the burners of zones 2 and 4. An unfired cooling one Is to the right of zone 3.

Belt conveyors belt speed 1 m/s handling solids of density 1.6 Mg/m with steel welded frame, head and tail pulley, troughing idlers, roller bearings, cold rolled steel shafters, four ply, 28 oz belt excluding motor, drive and supports. FOB cost = 21000 for the product of (solids capacity, Mg/h) X (length, m) = 10 with n = 0.20 for the range 5000-5 X 10. L+M = 1.7-2.7. L/M = 0.3. 

The Power of Steel in Hard Rock Haulage by Hoist and Belt Conveyor... 

The lift and load capacity of hoist and belt conveyor systems depend on the strength and weight properties of the hoist ropes and conveyor belts. This paper presents an analysis of the cmrent limits of appHcation of steel wire ropes and steel cord conveyor belts for haulage in imderground mass mining operations. These limits of application are illustrated with reference to a beyond super haulcige system duty of 2000 m 60 Mt/a, i.e., 10000 t/h 6000 h/a. 

Synthetic fibers offer combinations of strength and weight that may challenge the apphca-tion of steel wire ropes for hoists and steel cords for belt conveyors. The appHcation of synthetic fibers to hoist ropes and conveyor belts are reviewed for increased limits of appHcation. 

Steel cord conveyor belts are a composite of steel wire cord and rubber. Synthetic fiber cord conveyor belts are a composite of synthetic fiber cord and rubber. Tensile loads are carried by the steel wire or synthetic fiber cord. Tensile loads are transferred through the splice by the rubber in shear. 

Figure 9 illustrates the hnear relationship between strength/width ratio (kN) and linear mass (m b) for steel cord conveyor belts and for synthetic fiber cord conveyor belts. The extended steel cord and synthetic cord ranges are depicted by broken lines. The greater slope of this linear relationship for synthetic fiber cord conveyor belts compared with the steel cord conveyor... 

Figure 7. Steel cord conveyor belt—5 step splice arrangement...

Figure 14 demonstrates a viable solution using 2400 ST8000 steel cord belt conveyors with (4 X 500 m) 10000 t/h. Figure 14 also demonstrates that further development of conveyor belts beyond STIOOOO will offer a solution with 3 x 667 m, 2400 ST12500 10000 t/h. 

DIN 22129 1991-4 (1991) Steel Cord Conveyor Belts for Underground Coal Mining, Belt Joints—Dimensions and Requirements. Berlin DIN. 

The governing specification for the Selby belt is NCB Draft Specification for Fire Resistant Steel Cord Conveyor Belting, derived from NCB 158 for Textile Belting. 

Steel apron conveyors or chain conveyors, though mechanically more elaborate and expensive than belt conveyors, are preferable for product removal from impact crushers and from hammer crushers not equipped with bottom grids. The reason is that the material discharged from the crusher falls with greater impact force on the conveyor than when a bottom grid limits the size and impact velocity of the pieces discharged. 

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